Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming. The 40 mm fiddle is an excellent choice for 3:1 and 4:1 tackles on dinghy vangs and mainsheets, as well as for controls such as cunninghams and internal boom outhauls on larger boats.

Sheave Ø (mm)40 mm

Sheave Ø (in)1 9/16 in

Length (mm)115 mm

Length (in)4 1/2 in

Weight (g)125 g

Weight (oz)4.4 oz

Shackle pin Ø (mm)4 mm

Shackle pin Ø (in)5/32 in

Maximum line Ø (mm)6 mm

Maximum line Ø (in) 1/4 in

Maximum working load (kg)220 kg

Maximum working load (lb)485 lb

Breaking load (kg)735 kg

Breaking load (lb)1620 lb

FootnoteMaximum working loads and breaking loads for blocks based on cam strengths.